Nihonium
Isotopes

Isotope
Half-life
Half-life
Half-life
Decay mode
Discovery year
Discovery reaction
Isotope
Recent publications
Ref
NUBASE 2016
Decay mode
Discovery year
Discovery reaction
278Nh
1.4 ms
-
2.3 ms
α
2004
209Bi(70Zn,n)
282Nh
73 ms
-
140 ms
α
2007
237Np(48Ca,3n)
283Nh
75 ms
-
160 ms
α
2004
287Mc(—,α)
284Nh
0.91 s
-
0.93 s
α, EC
2004
288Mc(—,α)
285Nh
4.2 s
-
3.3 s
α
2010
289Mc(—,α)
286Nh
9.5 s
-
7 s
α
2010
290Mc(—,α)
287Nh
5.5 s
-
—
α
1999
287Fl(e−,νe)
290Nh
2 s
-
—
α
1998
290Fl(e−,νe)

Question: When  were 284Nh and 285Nh isotope of Nihonium discovered?
Answer:  284Nh and 285Nh isotope of Nihonium  were discovered in 2004 and 2010 respectively.